I posit that the growing anti-immigration sentiment partly comes from informational borders being eliminated by social media.

People want some of that friction back but can't put their finger on where the unease is coming from.

I further posit that this partly explains why Trump's approval rating around immigration are very negative despite successfully stopping immigration, which was one of the issued he polled the best on. He took away immigration, but the unease and insecurity from having zero information borders remains. (Yes there are other factors too especially around ICE conduct).